Death is the separation of the spirit from the body. A spirit is wind that has power to talk or make speech. Words are made of spiritual material. When a body is sick, feeble, weak or destroyed by an accident, the spirit can no longer stay in it and it leaves that body as if being freed from a prison. That's what is called death. In James 2:26, the bible says that a body without a spirit is dead. It's the body that dies and not the person or the spirit. The spirit lives forever albeit invisible and inaudible. Your demised loved one is in heaven if they were saved while alive on earth. Be comforted and be healed from all pain and grief in Jesus name.